<template>
  <div class="login">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" autocomplete="on"
             label-position="left">

      <div class="title-container">
        <h3 class="title">用户登录</h3>
      </div>

      <el-form-item prop="username">

        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="请输入用户名"
          name="username"
          type="text"
          tabindex="1"
          autocomplete="on"
        >
          <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon"/>
        </el-input>
      </el-form-item>


      <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
        <el-form-item prop="password">
          <el-input
            :key="passwordType"
            ref="password"
            v-model="loginForm.password"
            :type="passwordType"
            placeholder="请输入密码"
            name="password"
            tabindex="2"
            autocomplete="on"
            @keyup.native="checkCapslock"
            @blur="capsTooltip = false"
            @keyup.enter.native="handleLogin"
          >
            <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon"/>
            <svg-icon slot="suffix" @click="showPwd" :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"/>
          </el-input>

        </el-form-item>
      </el-tooltip>

      <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
        <el-form-item prop="code">
          <el-input
            ref="code"
            v-model="loginForm.code"
            placeholder="请输入验证码"
            name="code"
            tabindex="2"
            autocomplete="on"
            @keyup.native="checkCapslock"
            @blur="capsTooltip = false"
            @keyup.enter.native="handleLogin"
            style="width: 60%;"
          >

          </el-input>

          <div class="login-code">
            <img :src="codeUrl" @click="getCaptcha" class="login-code-img"/>
          </div>
        </el-form-item>
      </el-tooltip>


      <el-button :loading="loading" type="primary"
                 style="width:100%;margin-bottom:30px;"
                 @click.native.prevent="handleLogin">登 录
      </el-button>


    </el-form>


  </div>
</template>

<script>
import {validUsername} from '@/utils/validate'
import SocialSign from './components/SocialSignin'
import {getCaptcha} from '@/api/user'

export default {
  name: 'Login',
  components: {SocialSign},
  data() {
    return {
      codeUrl: undefined,
      loginForm: {
        username: 'admin',
        password: '123456',
        code: undefined
      },
      loginRules: {
        username: [{required: true, trigger: 'blur', message: "请输入账号"}],
        password: [{required: true, trigger: 'blur', message: "请输入密码"}],
        code: [{required: true, trigger: 'blur', message: "请输入验证码"}]
      },
      passwordType: 'password',
      capsTooltip: false,
      loading: false,
      showDialog: false,
      redirect: undefined,
      otherQuery: {}
    }
  },
  watch: {
    $route: {
      handler: function (route) {
        const query = route.query
        if (query) {
          this.redirect = query.redirect
          this.otherQuery = this.getOtherQuery(query)
        }
      },
      immediate: true
    }
  },
  created() {
    //加载验证码
    this.getCaptcha()
  },
  mounted() {

    if (this.loginForm.username === '') {
      this.$refs.username.focus()
    } else if (this.loginForm.password === '') {
      this.$refs.password.focus()
    }
  },
  methods: {
    getCaptcha() {
      getCaptcha().then(res => {
        this.codeUrl = res.data
      })
    },

    checkCapslock(e) {
      const {key} = e
      this.capsTooltip = key && key.length === 1 && (key >= 'A' && key <= 'Z')
    },
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          /*
          * $store 里面存储了一个路径  点击登录就会跳转到这个路径里面
          * */
          this.$store.dispatch('user/login', this.loginForm)
            .then(() => {
              this.$router.push({path: this.redirect || '/', query: this.otherQuery})
              this.loading = false
            })
            .catch(() => {
              this.loading = false
            })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    getOtherQuery(query) {
      return Object.keys(query).reduce((acc, cur) => {
        if (cur !== 'redirect') {
          acc[cur] = query[cur]
        }
        return acc
      }, {})
    }

  }
}
</script>

<style lang="scss">
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("../../assets/images/login-background3.jpg");
  background-size: cover;
}

.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}

.login-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;

  .el-input {
    height: 38px;

    input {
      height: 38px;
    }
  }

  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 2px;
  }
}

.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}

.login-code {
  width: 33%;
  height: 38px;
  float: right;

  img {
    cursor: pointer;
    vertical-align: middle;
  }
}

.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}

.login-code-img {
  height: 38px;
}
</style>
